How do you fill a large gap in a concrete slab?

Quote from the video:
Quote from Youtube video: Now if i have any large holes where voids are starting to form underneath the concrete. I do recommend some sand for that and filling those voids in before you seal off the top with the tremco.

What do you do with the space between concrete?

The best way to fill a gap between a concrete slab and a wall is by first measuring the size of the gap. If it is ¼-inch (6 mm) or smaller, it can be filled with urethane caulk. If the gap is larger than 0.25 inches, press a foam backer rod into the gap, then fill the gap with urethane caulk.

How do I fill a large gap in my foundation?

Quote from the video:
Quote from Youtube video: So you're going to take your backer rod pack. It in there to bring it closer to the surface.

How do you seal a large gap between a wall and floor?

Use silicone caulk to create a waterproof seal.

If you’re fixing a gap between a tile floor and wall, such as in a shower or a bathroom, go with a silicone caulk so you can create an airtight, waterproof seal. Look for silicone caulk at home improvement stores, hardware stores, and online.

How do you fill a 4 inch gap in concrete?

Dig a 4-inch wide trench along the sides of the slabs from the crack or gap closest to the house all the way down to the street or sidewalk. This trench should be a deep as the slabs are thick. Fill the trenches on either side of the driveway with small, rounded pea gravel (the size of marbles or peas).

How do you seal a gap between concrete and house?

One way to fill the gap between your concrete patio and your house is through caulking this gap. Caulking involves using a material that will seal joints or seams to prevent leakage or for water to enter the concrete gaps transferring this absorbed water inside your homes.

What is the best concrete expansion joint material?

Silicone provides an excellent alternative to the three expansion joint fillers above, and for a few reasons. First and foremost, it is flexible and durable, allowing it to accommodate the natural expansion and contraction of the slab without cracking or breaking its seal.

How do I fill a large gap between my driveway and garage?

Armacell notes that foam backer rod is a flexible rope that compresses to fill the gap, giving the sealant something to cling to. Use a putty knife to press it tightly into areas too narrow to push in with your fingers. The backer rod should fill the gap and make contact with the concrete on both sides of the gap.

How do you make concrete tight spaces?

For small holes you may need a “funnel” to place at the end of your trough. With the folding utility knife, cut the bottom from your milk jug, and cut around the top to widen the opening enough to allow the cement to pass through. Leave the handle intact for easy support.

What does it mean when the floor is separating from the wall?

It’s confusing to see your floor actually separating from the wall. What causes these gaps? In general, it’s caused by your home settling unevenly. This exerts pressure on the home in different ways, which may show up as a gap between the wall and the floor.

How do you seal a draft between the floor and the wall?

Draft Where Floor Meets Wall – What To Do?

  1. Identify the exact location of the gap.
  2. Clean the area that will be sealed.
  3. Use silicone caulk to seal the gap.
  4. Spread the caulk with a caulking tool.
  5. Let the caulk dry for 24 hours.

Why is there a gap between my wall and floor?

Gaps between your walls are often caused by a home’s foundation settling into poorly compacted, moisture-softened, or shrunken soils below the structure. Few issues can make a homeowner’s heart drop quite like noticing a gap between the walls and floor (or ceiling) of a property.

Can you fill concrete expansion joints with sand?

Prep of the joint is the same as before, however, do not use sand to fill up an expansion joint. Expansion joints need the material within the joint to be compressible and sand is not. One exception is if you are applying a thin layer of sand over old fiberboard to prevent sealant from leaking through.

Should I caulk my concrete expansion joints?

Even expansion joints in your concrete driveway should be caulked. They can be the biggest culprit of water under your slabs. Notice how the caulking is slightly lower than the concrete slab around it. This protects the caulk from wear and tear of people walking and driving over it.

Can you cut expansion joints in old concrete?

Control joints can be “created” while the concrete is being poured by using a tool to make the joint. These joints can also be cut into the slab once the slab has cured enough to prevent chipping during the cut.

How do you repair large cracks in concrete garage floor?

Epoxy is a common way to fill in larger cracks, and so is a polymerized concrete mix. The polymer acts as a binder, and helps adhere the filler to the rest of the original concrete on your floor.

Can you pour concrete over concrete?

You can put new concrete over old concrete. However, unresolved issues with your old concrete, such as cracks or frost heaves, will carry over to your new concrete if not taken care of. In addition, you must pour it at least 2 inches thick.

Should I worry about cracks in my concrete floor?

Generally, cracks in your floor are nothing to worry yourself over. The only time that you might be concerned is if the cracks start changing vertically, suggesting that there is some settling happening.